Methodology for evaluating the transition process dynamics towards 4th generation district heating networks

Volkova, Anna; Mašatin, Vladislav; Siirde, Andres

doi:10.1016/j.energy.2018.02.123

Cited by 87 publications

(34 citation statements)

References 29 publications

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“…Wirtz et al [3] discern even the fifth generation of DH following the fourth one. The creation of a group substation for connecting low-temperature DH subnetworks to an urban high-temperature network was described as a part of the energy and environmental modeling [4] and within Volkova's methodology for evaluating the transition process dynamics towards fourth generation DH networks [5]. The changes in the cross-section geometry of the thermal insulation of the DH network from circular to egg-shaped are under research in Ref.…”

Section: Prior Researchmentioning

confidence: 99%

Method for Assessing Heat Loss in A District Heating Network with A Focus on the State of Insulation and Actual Demand for Useful Energy

Чичерин

Mašatin²,

Siirde

et al. 2020

Energies

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The goal of this paper was to evaluate heat loss and the demand of district heating (DH) in the context of the fourth generation DH concept using a data-driven approach. The heat loss profile was calculated with GIS Zulu© (software (8.0.0.7539, Politerm, LLC, St.Petersburg, Russia) using eight various states of insulation, detailed information on thermal conductivity, internal heat transfer coefficient, and geometry of the concrete trench. There is a strong correlation between the heat sold and the average annual outdoor temperatures. The outstanding episodes are extremely rare, and the difference in the overall pattern is elusive. The results of the annual heat production and annual heat loss analyses were compared using three different estimation methods. The new method was the only one that showed a positive effect after the complete modernization of thermal insulation. The actual proportion of heat loss is much higher at 16%, while the actual heat delivery is less than anticipated at 85–86% only. The trend of the normative approach is correct but cannot determine changes in network heat loss due to aging. The method focuses on the effects of the state of insulation and actual supply temperature levels. The transition to smart energy systems includes strategic and progressive energy planning, as well as new pricing rules and tariffs. Thus, the method presented is the first step in the transition towards the fourth generation DH networks.

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Section: Prior Researchmentioning

confidence: 99%

Method for Assessing Heat Loss in A District Heating Network with A Focus on the State of Insulation and Actual Demand for Useful Energy

Чичерин

Mašatin²,

Siirde

et al. 2020

Energies

Self Cite

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“…Li and Nord also point out that decreasing heat demand will have an impact on the desirable future system design. Volkova et al [35] proposed a methodology for evaluating the transition progress in terms of KPIs based on identified barriers.…”

Section: Th Generation District Heatingmentioning

confidence: 99%

Cost-benefit analysis of district heating systems using heat from nuclear plants in seven European countries

Leurent

Costa

Rämä

et al. 2018

Energy

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“…For example, the installed heating capacity of the DH network in Tianjin (China) is 11,113 MW by the end of 2015 [12]. For huge district heating network like this, upgrading pipelines and heat sources are very complex work [13]. Decreasing the supply temperature of the DH network to 30 ~ 70 ℃ will lead to smaller supply and return temperature difference.…”

Section: Dilemma On Integrating Low-grade Renewables Into Current Dh mentioning

confidence: 99%

Integration of geothermal water into secondary network by absorption-heat-pump-assisted district heating substations

Song

Wang

You

et al. 2019

Energy and Buildings

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Integrating renewable energy into District Heating (DH) systems can significantly save the consumption of fossil energy and receive environmental benefits. The 4th Generation District Heating (4GDH) is the most promising technique for future DH systems by decreased supply temperature and use of low-temperature renewable thermal sources. As current district heating networks are mostly designed with supply temperature around 100℃, high hydraulic resistance and large pressure loss may often occur if decreasing the supply temperature to 30-70℃. This paper has proposed a Composite District Heating Substation (CDHS) with integrated geothermal water into the secondary network by Absorption Heat Pump (AHP). This has been demonstrated to be a feasible and effective solution for using low-temperature geothermal water in DH systems, without decreasing supply temperature of the primary network. The AHP is driven by hot water from the primary network, and the heat of the geothermal water could be used more intense by reducing its return temperature by the AHP and the plate 1 These authors contributed equally to this work. 2 heat exchanger. In this study, both the AHP and the whole substation were simulated by MATLAB, and the results indicated that the heating capacity of AHP increased when increasing the temperature or the mass flow rate of geothermal water, the mass flow rate of the primary network, or when decreasing the return temperature of the secondary network. Additionally, it was found that using temperature regulation with flow changing in stages in the secondary network could receive a higher COP of the AHP and a higher ratio of geothermal energy used in the substation. A case study was carried out as well and its results showed that comparing to conventional DH substations, the CDHS could save 8.0% of the annual cost and reduce 25.6% of the pollutant emissions for a heating season.

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Methodology for evaluating the transition process dynamics towards 4th generation district heating networks

Cited by 87 publications

References 29 publications

Method for Assessing Heat Loss in A District Heating Network with A Focus on the State of Insulation and Actual Demand for Useful Energy

Method for Assessing Heat Loss in A District Heating Network with A Focus on the State of Insulation and Actual Demand for Useful Energy

Cost-benefit analysis of district heating systems using heat from nuclear plants in seven European countries

Integration of geothermal water into secondary network by absorption-heat-pump-assisted district heating substations

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